What is Customer Acquisition Cost (CAC)?
What it truly costs to win one new customer - sales, marketing, and everything in between.
Customer Acquisition Cost (CAC): definition
CAC measures how efficiently a business buys growth. A rising CAC signals saturating channels or weakening messaging; a falling CAC signals improving efficiency. To be meaningful it must be fully loaded - including sales salaries and commissions, marketing spend, and related tools - not just ad cost. CAC is only half the story; it must be judged against the lifetime value it produces.
Customer acquisition cost
CAC = Total Sales & Marketing Cost ÷ New Customers Acquired
Blended CAC covers all channels; paid CAC isolates paid acquisition. Include salaries, commissions, ad spend, and tools for a true figure.
How Fintra handles it
Because sales and marketing spend and new-customer counts live in Fintra, CAC can be computed from actual costs rather than a partial estimate, and split blended versus paid. It sits next to LTV and payback so the efficiency of growth is judged in full, and planning shows how a change in spend or conversion moves CAC.
- CAC computed from fully loaded sales and marketing spend
- Blended and paid CAC shown alongside LTV and payback
- Scenarios test how spend and conversion changes move CAC
Worked example
Frequently asked questions
What should be included in CAC?
All costs of acquiring customers over the period: advertising and marketing spend, sales team salaries and commissions, marketing and sales tools, and related overhead. Excluding sales costs is a common mistake that understates CAC and overstates growth efficiency.
What is the difference between blended and paid CAC?
Blended CAC divides all acquisition spend by all new customers, including those acquired organically. Paid CAC counts only paid channels and the customers they produce. Paid CAC better reflects the true cost of buying growth, while blended can look artificially low.
What is a good CAC?
There is no universal number - CAC is only meaningful relative to lifetime value and payback. A common target is an LTV:CAC of at least 3:1 with CAC payback under about a year. A high CAC can be fine if customers are valuable and loyal enough.
How can a business lower CAC?
Improve conversion rates, shift spend to more efficient channels, strengthen referrals and organic acquisition, and shorten the sales cycle. Because CAC is fully loaded, gains in sales productivity lower it as much as cheaper marketing does.
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